EU Threatens Complaint if Friday Meeting Ends in Deadlock

BRUSSELS—A Russian ban on pork imports from the European Union threatens to escalate into a fight at the World Trade Organization, the latest in a series of disputes that have frayed ties between Brussels and Moscow.

A key meeting in Moscow on Friday between the two sides is likely to end in deadlock, after Russia signaled it would keep the ban in place despite complaints from the 28-nation bloc. The EU could move to file a WTO...